My next problem with .cljc (which is going very very well overall!) has to
do with macros.
Should I mention that I am building under Figwheel? This toolchain stuff
has this old Lisper's head spinning.
Without a conditional, code using this macro compiles fine (the key bit
being where I offer devs a little syntactic sugar in coding up defobserver
so they can omit the dispatching types js/object (which I myself rarely
specify):
(defmacro defobserver [slot types params & body]
(assert (keyword? slot) "defobserver> slot should be a keyword.")
(let [ftypes (concat types (take-last (- 3 (count types))
'(::tiltontec.modeller.cell-types/model
js/object js/object)))
fparams (concat params
(take-last (- 4 (count params))
'(me new-value old-value c)))]
`(defmethod tiltontec.modeller.observer/observe [~slot
~@ftypes][~'slot ~@fparams]
~@body)))
But on clj those need to be Object. So I tried this (after wrapping the
above in #?(:cljs ...):
#_(:clj
(defmacro defobserver [slot types params & body]
(assert (keyword? slot) "defobserver> slot should be a keyword.")
(let [ftypes (concat types (take-last (- 3 (count types))
'(::tiltontec.modeller.cell-types/model
Object Object)))
fparams (concat params
(take-last (- 4 (count params))
'(me new-value old-value c)))]
`(defmethod tiltontec.modeller.observer/observe [~slot
~@ftypes][~'slot ~@fparams]
~@body))))
And in fact, that was a brave attempt to salvage my original attempt, which
conditionalized just the types:
#?(:clj Object :cljs js/object)
I repeated that twice, but just realized this would have been a good spot
for the splicing variant.
Anyway, no matter what I do I get a warning compiling to cljs that Object
is unknown, and indeed a macroexpand-1 of '(defobserver :fu [nil][_ _ _ _]
42) shows Object where I should be seeing js/object.
I am also getting the same problem with an unrelated macro in which I am
trying to conditionalize between dosync and do. Interestingly, I just
noticed the same macro conditionally chooses between Exception. and
js/Error. and I am not seeing warnings there!
Is this another known issue?
ps. I will try the old trick of having a helper defn with-defobserver and
with-whatever to see if this is purely a macro interaction.
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